Added external link to GeoIP's free database

Explanation-of-Options-in-qBittorrent.mediawiki

@@ -114,7 +114,7 @@ The following settings are also documented in qBittorrent and libtorrent, respec
 * '''Recheck torrents on completion''' — after the torrent is completely downloaded a recheck operation is performed on the torrent. (''TBA'': completing may or may not be before ''seeding'' completion.)  This is specially useful on unreliable disks or filesystems.
 * '''Transfer list refresh interval''' — controls how fast or slow the transfer list view is updated.  Adjusting the refresh interval to a lower value displays less accurate speeds in average, but nicer results.  If qBittorrent is running in the background, you may increase the value instead.  Using lower values might cause qBittorrent to use more resources. The default value is `1500 ms` (i.e. 1.5 seconds).
 * '''Resolve peer host name''' — when enabled, the address list in the Peers tab will try to resolve IP addresses to hostname using reverse lookups. Might not always return accurate results.
-* '''Resolve peer countries using GeoIP''' — when enabled, qBittorrent tries to lookup the originating country of each peer using GeoIP database.
+* '''Resolve peer countries using GeoIP''' — when enabled, qBittorrent tries to lookup the originating country of each peer using the [https://dev.maxmind.com/geoip/geoip2/geolite2/ GeoIP] database.
 * '''Display notifications''' — will make qBittorrent output system tray notifications for various events (e.g. download completed, search finished, an error occurred).  Disabling this option will silence qBittorrent.
 * '''Display notifications for added torrents''' — when enabled will make qBittorrent output new notification on adding a new torrent.  Specially useful if torrents are added using RSS or the Web UI.
 * '''Confirm removal of all tags''' — displays a user confirmation message before removing all tags.